U.S. Dispatches 1,000 Marines as Security Problems Worsen in the North African Country

WASHINGTON—The U.S. military dispatched 1,000 Marines on an amphibious assault ship to the Mediterranean Sea as the State Department urged Americans to leave Libya immediately because of the worsening security problems.

The USS Bataan has been moved to the region to give the U.S. extra help if needed, Col. Steve Warren, a Pentagon spokesman,...